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How to Balance:

Word equation: Iron (II) oxide + Carbon monoxide → Iron + Carbon dioxide

Type of Chemical Reaction: For this reaction we have a chemical reaction.

Balancing Strategies: In this reaction FeO is losing it's O atom to form Fe, iron metal.

Be careful to count all of the Oxygen (O) atoms on the reactants side of the equation!

For a complete explanation, watch:

When balancing chemical equations our goal is to have the same number of each type of atom on both sides of the equation.

Only change the coefficients (these are the numbers in front substances).
Never change the subscripts (the small numbers after elements).